Asset-Specific Debt, Net (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) SecurityLoan	Dec. 31, 2021 USD ($) SecurityLoan
Financing provided
Participating Mortgage Loans [Line Items]
Count | SecurityLoan	2	4
Financing provided, Principal Balance	$ 469,766	$ 400,699
Financing provided, Book Value	$ 463,097	$ 393,824
Financing provided | LIBOR
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost Rate	3.24%	2.78%
Collateral assets
Participating Mortgage Loans [Line Items]
Count | SecurityLoan	2	4
Collateral assets, Principal Balance	$ 520,527	$ 446,276
Collateral assets, Book Value	$ 510,190	$ 435,727
Collateral assets | LIBOR
Participating Mortgage Loans [Line Items]
Weighted Average Yield/Cost Rate	4.45%	4.04%